I don't believe PCManFM's problem is the only problem within V7.1. If I look for possibly problems, I'll get this list. In comparison, within V7.0.5 are no problems reported by kn-what.sh.
Code:
Desired=Unknown/Install/Remove/Purge/Hold      
|  Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend    
|/  Err?=(none)/Reinst-required    (Status,Err:
||/  Name    Version
   
hi  artwiz-cursor    1:1.3-2knoppix1
hi  egoboo    1:2.8.1-2knoppix1
hi  egoboo-data    1:2.8.1-2knoppix1
hi  gnome-orca    3.4.2-2
pi  kdebase-workspace    4:4.8.4-6
hi  libfm-data    1.1.0-1knoppix
hi  libfm-dev    1.1.0-1knoppix
hi  libfm-gtk-bin    1.1.0-1knoppix
hi  libfm-gtk1    1.1.0-1knoppix
hi  libfm1    1.1.0-1knoppix
pi  libkutils4    4:4.8.4-4
pi  libnspr4-0d:i386    2:4.9.4-2
pi  libnss3-1d:i386    2:3.13.6-2
hi  lxsession    0.4.6.1-4knoppix
pi  module-init-tools    9-2
hi  ntfs-3g    2:2012.1.15AR.8-2knoppix0
hi  pcmanfm    1.1.0-1knoppix
pi  python-aptdaemon-gtk    0.45-1
pi  python-gobject    3.2.2-1
hi  speech-dispatcher    0.7.1-6.2
hi  testdisk    1:6.14-0knoppix1
hi  wpasupplicant-gnutls    1.0-4knoppix2
hi  xfonts-artwiz    1:1.3-2knoppix1